Non-cohesive soil sample filling mold of geotechnical triaxial test

Abstract

The invention aims at providing a non-cohesive soil sample filling mold of a geotechnical triaxial test, aiming at solving the problems in the prior art that a mold is easy to deform and dislocate, and a test sample is difficult to mold and is easy to deform. The non-cohesive soil sample filling mold of the geotechnical triaxial test, disclosed by the invention, comprises a round mold and a hoop, wherein the round mold is provided with a containing cavity; grid lines for reducing overlarge partial negative pressure are arranged on an inner wall of the round mold; the round mold comprises a first half-round mold and a second half-round mold; a bulge is arranged at the end part of the first half-round mold; a groove adaptive to the bulge of the first half-round mold is formed in the end part of the second half-round mold; the end parts of the first half-round mold and the second half-round mold abut against each other; and the hoop sleeves the round mold and is used for fastening the first half-round mold and the second half-round mold. The non-cohesive soil sample filling mold of the geotechnical triaxial test, provided by the invention, has the beneficial effects that the mold is not easy to deform and dislocate, a test sample is simple to mold, and the test sample is not easy to deform after molding.

Description

technical field [0001] The invention relates to the field of test devices, in particular to a non-cohesive soil sample loading mold for geotechnical triaxial tests. Background technique [0002] Geotechnical triaxial test is a method to measure the shear strength of soil. Under a certain fixed surrounding pressure, the axial pressure of the sample is gradually increased until the sample is destroyed. Based on this, the Mohr stress circle can be drawn. The same soil sample is tested under different surrounding pressures, and a set of Mohr stress circles can be obtained, and the common tangents of these Mohr stress circles can be obtained to obtain the envelope of the shear strength, and thus the soil sample can be obtained index of shear strength. Geotechnical triaxial tests require soil samples to be standard cylindrical, especially for non-cohesive soils. Due to the very weak bonding ability between soil particles, it is difficult for non-cohesive soils to form standard cy...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a non-cohesive soil sample loading mold for geotechnical triaxial testing to solve the problems in the prior art that the mold is easy to deform and move, and the sample is difficult to form and easy to deform.

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